Machine for polychromatic printing.



Patented Sept. 24,. l90l.

' w. a. & BIA. A. WHITE.

NACIIINE FOR POLYGIIRDNATIG PRINTING.

(Appliution filed Fish. 12, 1901.

3 Shoots-Shoat I.

(No Nodal.)

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No. 683,!62. Patented Sept. 24, I91.

'w. a. a n. A. A. WHITE.

MACHINE. FOB POLYGIIBOIIIATIG PRINTING.

(Application Med Feb. 19, 1901.)

(No Model.) 3 Sheets-Shoot 2.

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Patented Sent. 24, I90l.

No. 683,l62.

W. G. G. R. A. A. WHITE.

MACHINE FUR POLYGHBOMATIC PRINTING.

(Appliation med lob. is, 1901.

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(No Model.)

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UNITED STATES PATENT OFFICE.

\VILLIAM GEORGE WHITE, OF ANERLEY, AND ROBERT ALFRED ALBERT YVHITE, OFROTHERHITHE, ENGLAND.

MACHINE FOR POLYCHROMATIC PRINTING.

SPECIFICATION forming part of Letters Patent No. 683,162, datedSeptember 24, 1901. Application filedFebruary 12, 1901. Serial No.46,984. (Ndmodeh) "0 all whom it may concern:

Be it known that we, WILLIAM GEORGE WHITE, engineer, residing at ThurlowHouse, Wei ghton road,Anerley,and ROBERT ALFREDALBERTWHITE,engineer,residingat14Gomm road, Rotherhithe, in the countyof Surrey,

England,subjects of the King of Great Britain,

have invented a certain new and useful Machine for PolychromaticPrinting,of which the following is a specification.

This invention relates to the well-known polychromatic printing in whichsolid blocks or sheets of composition containing the colors or dyes areemployed. lVe cut or form the composition in the designs requiredaccording to the lengths of the repeats. The blocks of color or type aremade from two to six inches thick. The blocks of color are then cutintosheets of the required thickness. Say, for instance, the repeat of adesign is one yard square, we should split or cut the blocks into sixsheets, place them end to end on a suitable slab of wood covered withglazed cloth, and the sheets of color arejoined in one length, thusforming a sheet of color eighteen feet in length. The slab carrying thesheet'of color thus joined'is then placed on a frame or chute andlowered by any suitable means onto the top of the cylinder of theprinting-machine. The cylinder is made to slowly rotate, the glazedcloth being carefully removed as the color composition adheres to thecylinder. The ends of the slab of color are made to butt and are thenjoined together, forming an endless band of color six yards incircumference. After many experiments we have found that the compositionadheres with great tenacity to metal, particularly iron. The cylinder wemount in bearings in a suitable framework, which also carries thebearings for afnu mber of. pressingrollers placed around theprinting-cylinder at suitable distances apart. At one side of thecylinder or in any other suitable'position is mounted a paring-knife ina slide-rest. This knife before the printingis commenced is brought intoposition against the surface of the design composition and theprintingcylinder is caused to turn, by which means the surface of thecomposition is turned or out perfectly true The. knife is then removed.The design surface being now ready for printing, the fabric or othermaterial to be printed is batched or wound on reels suitably carried byframing in front of the machine. Before passing to the printingcomposition the fabric is damped with turps or any other suitablesolvent, for which purpose it passes over a damping-roller supplied withthe damping liquid from a suitably-arranged trough. The fabric ispressed onto the damping-roll by a pair of rollers, one on each side,whose height can be adjusted so as to regulate the amount of dampingliquid applied to the fabric. The fabric is then passed between theprinting-cylinder and pressingrollers, where it receives the impression.

Figure l is a side elevation ofa machine constructed according to ourinvention. Fig.

1 is a section on the line 1 1, Fig. 1, showing the damping apparatus.Fig. 2 is a section on the line 2 2 of Fig. 1, andFigs. 2 and 2 showdetails. Fig. 3 is a side elevation of the lower portion of the machineto a larger scale. Figs. 4, 4:, 5, 6, and '7'show details of themechanism for automatically feeding up the pressing-rolls as required.Fig. 4: shows the position at half-stroke of the eccentric forequalizing the action of the pressing-rolls. Fig. 5 is an edge view ofthe eccentric at half-stroke.

Figs. 6 and 7 show in side and plan views the arrangement of gearingemployedfor-transmitting motion to the eccentric.

Referrlng now to Figs. 1 and 2, 1 1 are two side frames of convenientshape, which are boltedtogether by stay-rods. Between these sideframesand keyed upon a shaft 2 is a cylinder 3, the shaft 2 being supported inhearings in the side frame 1 and having fixed to it a toothed wheel 2*,which is driven in any convenient manner.

4 is the roll of material to be printed, and 5 is a roll of back-cloth,so arranged that it passes over the back of the material to be printedan d prevents the color from the rollers from printing on the back ofthe printed cloth. The cloth from the rolleret is led over and undertension bars or rollers 6, mounted in bearings in bracket-supports 7,bolted to the frame 8. The fabric 4 to be printed is led, as shown bythe dotted line in Fig. 1, over the damping-roller 9, running in thetrough 10, containing the damping liquor or spirit. The pressure of thefabric on the dam ping-roller is regulated by the two rollers 11,suspended from nuts 12, which can be raised or lowered by the screws 13,turned by the hand-wheel 14. The cloth then passes over the bed of theknife-rest and then suecessively under the pressure-rollers 15. Thepressure-rollers are mounted eecentrically to short shafts 16, as shownin Figs. 2, 2, and 2 which are gradually rotated, so as to bring therollers forward as the work proceeds. The shafts 16 work in hearings inthe side frame 1, and each shaft is formed with a collar 17, which bearsagainst the outside of the frame 1. Pinions 18, fixed to the shafts 16,have bolted to them plates 19, in which are the bearings of the rollers15. The pinions 18 at opposite ends of the cylinder gear into spurwheels20, mounted loosely on shaft 2,to which a rotary motion is given, ashereinafter described, thus rotating the pinions 1S, and thepressure-rollers 15 are caused to follow up the gradually-decreasingperiphery of the cylinder. At the commencement of the printing operationthe periphery of the roller 15 may be at, say, line 1 of Fig. 2, whichrepresents the maximum thickness of coloring material the machine iscapable of receiving, and the rollers will follow up the decreasingthickness of color as the printing proceeds until the line 2 is reachedand the color is all used up, at which time the pressure-roller will bein the dotted position. It will be obvious that the amount of forwardmotion given to the pressure-rollers by the partial rotation of thepinions 18 will be different at different positions of the rollers, andtherefore means must be provided to equalize this motion. To obtain thisend, we have devised the following arrangement of gearing: Eachspur-Wheel 20 is mounted loosely on the shaft 2, to which are fixedspeed-pulleys 21, driving by a band speed-pulleys 22 on a second shaft23, turning in bearings in the frame 1 and having mounted upon it aswinging frame 24. The shaft 23 also carries a worm 25, which goals witha worm-wheel 26, mounted on a spindle 27, carried by the swinging frame24. The spindle 27 is geared by pinions 28 and 29 with a second spindle30, also carried by the swinging frame 24. On the second spindle is aworm 31, which gears into a worm-wheel 32, keyed on one end of a thirdshaft 33, which is supported in a bearing in the swinging frame 24. Theother end of the third shaft 33 has a worm 34 fixed to it and works in abearing carried by a forked frame 35, the prongs of which span a fourthshaft 36 and form a guide for the frame during its rising and fallingmovements,hereinafter described. The forked frame carries abearing forthe end of a third spindle 37, the other end of which is supported bythe strap of eccentric 38. This spindle 37 has fixed to it a wormwheel39, gearing with the worm 34 on the third shaft 33, and it also carriesapinion 40,

gearing with a segmental rack 41, formed at the back of the eccentric38, which is mounted loosely on the fourth shaft 36 and is connectedthereto by means of a clamp 42 on the cocentric gripping the disk 43,which is keyed to the shaft 36. By this means of attaching the eccentricto the shaft the adjustment of the parts will be greatly facilitated instarting and stopping the machine, and the parts of the gearing may bereadily separated and thrown out of action. The shaft 36 carries at itsopposite ends a pinion 44, each of which gears with the spu r-wheels 20,through which motion is communicated to shafts 16 and pinions 18. Thefourth shaft 36 is mounted in fixed bearings, and as the eccentric 38rotates the forked frame 35 and the third shaft 33 will rise from thedotted position, Fig. 4, t0 the position shown at Fig. 4, being allowedto do so by reason of the pivoting of the frame 24,to which the thirdshaft 33 is attached, and as the rotary motion continues will descend tothe position shown at Fig. 4. The position of the eccentric 38 withregard to that of the pressure-rollers at the commencement of theprinting operation will be best understood by reference to the enlargedview, Fig. 3, the eccentric and rollers moving in the same direction,but commencing at different points of the circle. It will be under stoodthat by the adoption of this arrangement of gearing for communicating acontinuous advancing'motion to the pressurerolls the speed of theprinting-cylinder as communicated to the pulleys 22 is greatly reducedduring its transmission to the fourth shaft 36 by the several worms andwornn wheels; also, that owing to the relative positions in which theeccentric 38 and the shafts 16 are set the pressure-rolls will be movedup to the color-surface at an even speed equal to the rate ofconsumption of the coloring material.

In order to keep the pressure-rollers up to their work and to givesufficient pressure for heavy fabrics, the following arrangement isadopted:

is an arm pivoted on a stud 46 and carrying a weight 47.

48 is a ratchet-wheel, and 49 a pinion, which are fixed together andmounted loose on the stud 46, the pinion 49 gearing with the pinion 44.

. 50 is a pawl pivoted to the arm 45 and engaging with the ratehet-wheel48.

The pinions 44, as above described, gear with and drive the wheels 20,by which the pressure-rollers 15 are actuated, and therefore the Weight47 tends to press the rollers 15 against the fabric, and by moving theweight 47 along the arm 45 this pressure can be regulated. As the wheels20, and consequently the arm 45, only turn through a small angle, thispressure is approximately constant.

What we claim is 1. The combination 'of a printing-cylinder,

a trough for containing damping liquid, a roller in the trough, a pairof hanging frames, a pair of rollers mounted in the frames one on eachside of the first roller, nnts forming part of the frames, a pair ofvertical screws in the nuts, and means for turning the screws.

2. The combination of a printing-cylinder, a toothed wheel coaxial withthe cylinder, a series of pinions gearing with the wheel, a series ofpressing-rolls arranged around the cylinder and pivoted eccentrically tothe pinions, a pinion driving the wheel, a ratchet-wheel fixed to thepinion, a weighted arm free to rotate about the axis of the pinion and apawl pivoted to the arm and engaging with the ratchet-wheel.

3. The combination of a printing-cylinder, a toothed wheel coaxial withthe cylinder, a series of pinions gearing with the Wheel, plates fixedto the sides of the pinions, a series of pressing-rolls arranged aroundthe cylinder and pivoted to the plates eccentrically to the pinions andmeans for rotating the wheel.

4. The combination of a printing-cylinder, a toothed wheel coaxial withthe cylinder, a series of pinions gearing with the Wheel, plates fixedto the sides of the pinions, a series of pressing-rolls arranged aroundthe cylinder and pivoted to the plates eccentrically to the pinions, apinion driving the Wheel, a ratchet- Wheel fixed to the pinion, aweighted arm free to rotate about the axis of the pinion and a pawlpivoted to the arm and engaging with the ratchet-wheel.

WILLIAM GEORGE WHITE. ROBERT ALFRED ALBERT WHITE. Witnesses:

A. W. TUNBRIDGE, E. MARESOAUX.

